Aprvtio Refrigerant Leak Detector, ALD-200 Freon Leak Detector, Battery Powered, Freon Sniffer Automotive Halogen Gas Leak Detector for R134A R410A R22 R1234YF R600a R290 CFCs HCFCs HFCs HCs HFOs.

1. The power indicator: realtime instructions battery allowance 2. When opening the buzzer status in green, closing status in the red 3. PEAK button instruction: indicates the PEAK function status, and the light will be on when you use this function 4. The maximum leak record: When the PEAK function is turned on, it can record the maximum leakage value you detect 5. The current leakage indicator: indicates the current leakage 6. Fault alarm: When the sensor failure, a fault indicator shows up 7. Warmup countdown: warmup time is 30 seconds. When the power in on it will show the warmup process in the countdown 8. The sensitivity level: display the current sensitivity level.